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Method for detecting dynamic specific oxygen utilization rate of activated sludge system

A technology of specific oxygen consumption rate and system dynamics, applied in the field of SBR technology, it can solve the problems of hysteresis and inability to provide online feedback, and achieve the effects of simple operation, high degree of automation and good reproducibility.

Active Publication Date: 2009-09-23
BEIJING UNIV OF TECH
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Problems solved by technology

[0009] The method proposed by the present invention realizes the online detection of SOUR, visually displays the SOUR curve, and feeds back to the actuator of the terminal through the controller (PLC) to control the reaction process, which solves the problem of offline measurement of traditional measurement methods, which has hysteresis and cannot be fed back online. question

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  • Method for detecting dynamic specific oxygen utilization rate of activated sludge system
  • Method for detecting dynamic specific oxygen utilization rate of activated sludge system

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Embodiment Construction

[0031] The reaction device adopted in this embodiment comprises a reactor system, a metering system and an automatic control system (such as figure 1 shown).

[0032] Reactor system: Domestic sewage is led to the water tank 1, lifted by the water pump 2, and enters the SBR reactor 4 through the water inlet pipe 3. The mixing of anoxic and anaerobic is done by stirrer 5. The aerobic oxygenation is completed by the air blower 6 through the microporous aeration head under the flow rate adjusted by the flow meter 7 , the carbon source required for denitrification is added by the dosing pump 8 , and the drainage is completed through the drain valve 9 .

[0033] The metering system includes a closed metering bottle 10, which is placed on a magnetic stirrer 11. When the system is running, the rotor of the magnetic stirrer keeps stirring to keep the sludge in a suspended state. The return pump 12 controls the return flow of the sludge to make the whole sludge The system is in a loop...

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Abstract

The invention relates to a method for detecting a dynamic specific oxygen utilization rate of an activated sludge system, belonging to a theory and a technology for enhancing a biological nitrogen removal process by activated sludge process. Aiming at the problems of a traditional method for measuring the oxygen utilization rate such as off-line measurement, hysteresis quality, no on-line measurement and on-line feedback, and the like, the invention provides a method for detecting the specific oxygen utilization rate of the activated sludge system with on-line measurement and on-line feedback. The invention has the following creative features that a programmable controller and a measuring system are used for on-line monitoring the specific oxygen utilization rate of the activated sludge and effectively representing a SBR technical biochemical reaction process; wherein, when the specific oxygen utilization rate is lower than a set value, the controller judges according to a feedback signal so as to transmit a control signal to a fan to stop aeration. The invention has the advantages of simple operation, sensitive response, etc. By detecting the index, the invention can timely feed back the operation information in the process of aerating, therefore establishing a theoretical base and a data support for realizing real-time control which uses the specific oxygen utilization rate as a parameter.

Description

technical field [0001] The invention relates to a detection method for SBR biological treatment of nitrogen-containing wastewater, in particular to an SBR process capable of deep denitrification and automatic control. The technical field is: activated sludge process enhanced biological denitrification treatment theory and technology. Background technique [0002] The specific oxygen consumption rate (SOUR) of activated sludge is one of the important parameters to characterize the biological activity of sludge, which reflects the physiological state of activated sludge and substrate metabolism from the perspective of microbial respiration rate. In the initial stage of the application of the activated sludge method, the respiration rate of aerobic microorganisms was used to investigate the microbial biomass and substrate utilization rate. In recent years, SOUR has been used as a parameter to detect the biological activity of sludge. In terms of ability, it is generally valued...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 彭永臻李凌云王淑莹董国日吴蕾李论
Owner BEIJING UNIV OF TECH
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